RT info:eu-repo/semantics/article
T1 Direct determination of ascorbic acid in a grapefruit: paving the way for in vivo spectroelectrochemistry
A1 Garoz Ruiz, Jesús
A1 Heras Vidaurre, Aránzazu
A1 Colina Santamaría, Álvaro
K1 Química analítica
K1 Chemistry, Analytic
AB The study of real samples is more complicated than the study of other systems. However, the inherent advantages of UV–vis absorption spectroelectrochemistry should overcome some difficulties related to direct measurements in complex matrices. For this reason, a singular spectroelectrochemistry device has been fabricated and validated. The novel cell is based on single-walled carbon nanotubes, which are filtered and subsequently press-transferred on a polyethylene terephthalate support using a stencil with a custom design. With this new methodology, working, counter, and reference electrodes are completely flat on the surface, where two optical fibers are fixed in a long optical path length configuration. To demonstrate the usefulness of this device and the power of spectroelectrochemistry techniques to solve problems of the current world, this device is used to quantitatively detect the concentration of ascorbic acid in a complex matrix such as a fruit, directly, without any previous sample pretreatment. The ease to fabricate the device, the advantages related to its use, and the excellent results obtained not only with univariate but also with multivariate analysis, shed more light on the analysis of samples as they occur in nature. According to the particular features of this cell, to the best of our knowledge this is the first spectroelectrochemical sensor that can be inserted directly in a biological matrix, laying the groundwork to perform in vivo measurements in a near future.
PB American Chemical Society
SN 0003-2700
YR 2017
FD 2017-02
LK http://hdl.handle.net/10259/4947
UL http://hdl.handle.net/10259/4947
LA eng
NO Ministerio de Economıá y Competitividad(CTQ2014-55583-R, CTQ2014-61914-EXP, CTQ2015-71955-REDT) and Junta de Castilla y León (BU033-U16)
DS Repositorio Institucional de la Universidad de Burgos
RD 24-abr-2024